Function async_unbind_irq 

pub unsafe extern "C" fn async_unbind_irq(
    dispatcher: *mut async_dispatcher_t,
    irq: *mut async_irq_t,
) -> zx_status_t

Unbinds the IRQ associated with |irq|.

If successful, the IRQ will be unbound from the async loop and no further handler callbacks will be called.

Thread safety note: Since callbacks can be called any time while the irq is bound to the dispatcher, and a callback may be in flight when unbind is called, care must be taken when this API is used in a multithreaded dispatcher not to free the |async_irq_t| struct until after all callbacks have settled and unbind has been called. This is unlike the |async_wait| api, where |async_cancel_wait| will return |ZX_ERR_NOT_FOUND| if the callback has already been started. This can be avoided by using only a single threaded or otherwise synchronized dispatcher.

Returns |ZX_OK| if the IRQ has been successfully unbound. |irq| can be destroyed as soon as there are no more callbacks in progress. Returns |ZX_ERR_BAD_STATE| if the dispatcher is shutting down. Returns |ZX_ERR_NOT_SUPPORTED| if not supported by the dispatcher.

This operation is thread-safe.